<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    body{
        background-image: url(./images/img_tree.png),url(./images/bg.webp);
        background-position: 0 600px,left top;
        background-repeat: no-repeat,no-repeat;
        /* 改变背景图片大小 */
        background-size: auto auto,auto auto
        
        /* 组合模式  background 组合属性 background-image  */
        /* background: url(./images/img_tree.png) no-repeat 0 600px ,url(./images/bg.webp) no-repeat left top ; */
    }
</style>
<body>
   
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</body>
</html>